Visible crew/equipment: After Arthur's bike has crashed into the road workers hut, it goes along the road with the hut on top of the bike. If you look through the hut window you can see some crew members holding the hut up.

When Stan is in the safari park driving the bus with the monkey on the steering wheel the scene outside the bus is obviously background projection and at times it runs backwards giving the impression that the bus is in reverse when all the time it is going forwards.